$2K for emissions :(

Discussion in 'Emissions' started by Bruce, Aug 15, 2013.

  1. tribosessive

    tribosessive Well-Known Member

    P0420-Catalyst below threshold. I had the same code. I spent $2K. No doubt, you have excessive blowby from worn piston rings and valves. That Prism is durable. You shouldn't have to spend $2K again for several years. Look into "low ash" motor oils that run clean. Sooner or later you will have to invest in a new car. They are getting better and better, meaning cleaner running, more fuel efficient, and with greater durability. I offer this conjecture as someone who has logged over 2 million miles in the last 35 years, in passenger vehicles, and while dealing with California smog laws. I am glad I don't have your rust issues. I hope this helps.
    Last edited: Aug 17, 2013
  2. RedylC94

    RedylC94 Well-Known Member

    If oil consumption is a major factor, leaky valve stem seals may be more likely at fault than worn rings, and a lot less expensive to replace.
  3. 08EscapeHybrid

    08EscapeHybrid Moderator

    I remember when my area started emissions testing. My 1981 Buick was about 20 years old at the time. The carb was bad, and could not be rebuilt, as the person who had rebuilt it previously did it wrong and screwed it up. A new carb cost me $1,800. I was never so happy as the day that car was finally exempt.
  4. Ophbalance

    Ophbalance Administrator Staff Member

    If it's any consolation, it probably was the 02 sensor. I had a leak at the flex pipe on my Elantra that I ignored for too long. That, and a faulty sensor, lead to the engine running rich for a very long time. My Elantra met CA emissions so it had two cats. The first self destructed and lodged in the second. The only upside was it was within the federal mandated warranty and was replaced by Hyundai at the time.
  5. Bruce

    Bruce cheapskate

    The vehicle is 99 CA TLEV and 99 Fed NLEV compliant. Perhaps MA requires the same standards as CA (I recall Wayne came to MA to purchase a lower-emissions vehicle), or perhaps it's because the vehicle was built in the CA NUMMI plant (now Tesla). I've only had it since 102K and don't know which state it was originally sold in.

    I haven't tracked oil consumption accurately, but I'm planning to start doing so once I'm below the halfway mark again. I use 5-qt jugs of Mobil 1, but I have a turkey baster for auto fluids that measures fl oz.

    I'll stop watering down the 0-30 with 25-40% 0-20, which should help reduce blowby.

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